Examples of org.kiji.schema.impl.KijiPaginationFilter

org.kiji.schema.impl.KijiPaginationFilter
A KijiColumnFilter that allows for pagination over the qualifiers in a row, along with other filters that are and-ed together.
Note that starting in HBase 0.94, this will only return at most one value, regardless of where maxVersions is set to (because the HBase Filter return code is set to INCLUDE_AND_NEXT_COL semantics). Because of this, we have enforced a lack of options regarding maxVersions for this filter.

This should only be used internally e.g. in HBaseQualifierPager to retrieve qualifiers or other single-valued output.

public class TestOperatorColumnFilter {


  @Test
  public void testEqualsAndHashCode() {
    final KijiColumnFilter fColRange = KijiColumnRangeFilter.greaterThan("a");
    final KijiColumnFilter fPage = new KijiPaginationFilter(1);


    final OperatorColumnFilter andFilter1 = new AndColumnFilter(fColRange);
    final OperatorColumnFilter andFilter2a = new AndColumnFilter(fColRange, fPage);
    final OperatorColumnFilter andFilter2b = new AndColumnFilter(fColRange, fPage);
    final OperatorColumnFilter andFilter2Reversed = new AndColumnFilter(fPage, fColRange);

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    // and the number of qualifiers to fetch.


    final KijiColumnFilter filter = Filters.and(
        new KijiColumnRangeFilter(mMinQualifier, false, null, false),  // qualifier > mMinQualifier
        mColumnRequest.getFilter(),  // user filter
        new KijiPaginationFilter(pageSize),  // Select at most 1 version per qualifier
        new StripValueColumnFilter());  // discard the cell content, we just need the qualifiers


    final KijiDataRequest nextPageDataRequest = KijiDataRequest.builder()
        .withTimeRange(mDataRequest.getMinTimestamp(), mDataRequest.getMaxTimestamp())
        .addColumns(ColumnsDef.create()

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    // and the number of qualifiers to fetch.


    final KijiColumnFilter filter = Filters.and(
        new KijiColumnRangeFilter(mMinQualifier, false, null, false),  // qualifier > mMinQualifier
        mColumnRequest.getFilter(),  // user filter
        new KijiPaginationFilter(pageSize),  // Select at most one version / qualifier.
        new StripValueColumnFilter());  // discard the cell content, we just need the qualifiers


    final KijiDataRequest nextPageDataRequest = KijiDataRequest.builder()
        .withTimeRange(mDataRequest.getMinTimestamp(), mDataRequest.getMaxTimestamp())
        .addColumns(ColumnsDef.create()

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Related Classes of org.kiji.schema.impl.KijiPaginationFilter

org.apache.hadoop.hbase.filter.ColumnPaginationFilter

org.apache.hadoop.hbase.filter.Filter

org.apache.hadoop.hbase.filter.FilterList

org.kiji.schema.filter.TestOperatorColumnFilter

org.kiji.schema.impl.hbase.HBaseMapFamilyPager

org.kiji.schema.impl.hbase.HBaseQualifierPager

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